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<emphasis role="bold">PRIMARY SLUDGE COLLECTION AND REMOVAL</emphasis>
<emphasis role="bold">PRIMARY SLUDGE COLLECTION AND REMOVAL</emphasis>
<emphasis role="bold">Description</emphasis> Settled primary sludge typically is scraped into a hopper where it is removed by gravity or pumping. The hopper for rectangular tanks typically is located at the inlet end of the tank to minimize travel time of particles to the hopper. For circular tanks, the hopper typically is located in the center of the tank. The hopper, up to 3 m (10 ft) deep, typically has steep sides with a minimum slope of 1.7:1 (Great Lakes-Upper Mississippi River Board of State Sanitary …
Water Environment Federation: Design of Municipal Wastewater Treatment Plants: WEF Manual of Practice No. 8 ASCE Manuals and Reports on Engineering Practice No. 76, Fifth Edition. PRIMARY SLUDGE COLLECTION AND REMOVAL, Chapter (McGraw-Hill Professional, 2010), AccessEngineering Export